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/*-
* Copyright (c) 1999 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <dev/sound/pcm/sound.h>
#include <dev/sound/isa/sb.h>
#ifdef __alpha__
static int
es1888_dspready(u_int32_t port)
{
return ((inb(port + SBDSP_STATUS) & 0x80) == 0);
}
static int
es1888_dspwr(u_int32_t port, u_char val)
{
int i;
for (i = 0; i < 1000; i++) {
if (es1888_dspready(port)) {
outb(port + SBDSP_CMD, val);
return 0;
}
if (i > 10) DELAY((i > 100)? 1000 : 10);
}
return ENXIO;
}
static u_int
es1888_get_byte(u_int32_t port)
{
int i;
for (i = 1000; i > 0; i--) {
if (inb(port + DSP_DATA_AVAIL) & 0x80)
return inb(port + DSP_READ);
else
DELAY(20);
}
return 0xffff;
}
static int
es1888_reset(u_int32_t port)
{
outb(port + SBDSP_RST, 3);
DELAY(100);
outb(port + SBDSP_RST, 0);
if (es1888_get_byte(port) != 0xAA) {
return ENXIO; /* Sorry */
}
return 0;
}
static void
es1888_configuration_mode(void)
{
/*
* Emit the Read-Sequence-Key to enter configuration
* mode. Note this only works after a reset (or after bit 2 of
* mixer register 0x40 is set).
*
* 3 reads from 0x229 in a row guarantees reset of key
* sequence to beginning.
*/
inb(0x229);
inb(0x229);
inb(0x229);
inb(0x22b); /* state 1 */
inb(0x229); /* state 2 */
inb(0x22b); /* state 3 */
inb(0x229); /* state 4 */
inb(0x229); /* state 5 */
inb(0x22b); /* state 6 */
inb(0x229); /* state 7 */
}
static void
es1888_set_port(u_int32_t port)
{
es1888_configuration_mode();
inb(port);
}
#endif
static void
es1888_identify(driver_t *driver, device_t parent)
{
/*
* Only use this on alpha since PNPBIOS is a better solution on x86.
*/
#ifdef __alpha__
u_int32_t lo, hi;
device_t dev;
es1888_set_port(0x220);
if (es1888_reset(0x220))
return;
/*
* Check identification bytes for es1888.
*/
if (es1888_dspwr(0x220, 0xe7))
return;
hi = es1888_get_byte(0x220);
lo = es1888_get_byte(0x220);
if (hi != 0x68 || (lo & 0xf0) != 0x80)
return;
/*
* Program irq and drq.
*/
if (es1888_dspwr(0x220, 0xc6) /* enter extended mode */
|| es1888_dspwr(0x220, 0xb1) /* write register b1 */
|| es1888_dspwr(0x220, 0x14) /* enable irq 5 */
|| es1888_dspwr(0x220, 0xb2) /* write register b1 */
|| es1888_dspwr(0x220, 0x18)) /* enable drq 1 */
return;
/*
* Create the device and program its resources.
*/
dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1);
bus_set_resource(dev, SYS_RES_IOPORT, 0, 0x220, 0x10);
bus_set_resource(dev, SYS_RES_IRQ, 0, 5, 1);
bus_set_resource(dev, SYS_RES_DRQ, 0, 1, 1);
isa_set_vendorid(dev, PNP_EISAID("ESS1888"));
isa_set_logicalid(dev, PNP_EISAID("ESS1888"));
#endif
}
static device_method_t es1888_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, es1888_identify),
{ 0, 0 }
};
static driver_t es1888_driver = {
"pcm",
es1888_methods,
1, /* no softc */
};
static devclass_t pcm_devclass;
DRIVER_MODULE(snd_es1888, isa, es1888_driver, pcm_devclass, 0, 0);
MODULE_DEPEND(snd_es1888, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
MODULE_VERSION(snd_es1888, 1);
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